Adds the CoverageSimplifier class to the coverage package. This supports simplification of the edges of polygonal coverages while preserving the coverage topology:
The simplified coverage has the same number and types of polygonal geometries as the input
Coverage node points (inner vertices shared by three or more polygons, or boundary vertices shared by two or more) are not changed
if the input is a valid coverage, then so is the result
The simplification uses an approach equivalent to Visvalingam-Whyatt simplification. This is based on removing vertices which are the apex of low-area "corners". The amount of simplification is determined by a tolerance value which is the square root of the maximum corner area that can be removed.
Simplification of France regions, tolerance = 0.2
The simplifier supports an option to simplify only the inner (non-boundary) edges of the coverage. This allows simplifying portions of a large coverage, and ensuring the simplified result fits seamlessly with the original.
Inner Simplification of France regions, tolerance = 0.2
Adds the
CoverageSimplifierclass to thecoveragepackage. This supports simplification of the edges of polygonal coverages while preserving the coverage topology:The simplification uses an approach equivalent to Visvalingam-Whyatt simplification. This is based on removing vertices which are the apex of low-area "corners". The amount of simplification is determined by a tolerance value which is the square root of the maximum corner area that can be removed.
Simplification of France regions, tolerance = 0.2
The simplifier supports an option to simplify only the inner (non-boundary) edges of the coverage. This allows simplifying portions of a large coverage, and ensuring the simplified result fits seamlessly with the original.
Inner Simplification of France regions, tolerance = 0.2